Typewriting machine



, 1,615,837 Feb. 1, 1927. R. HANUS TYPEWRITING MACHI NE Filed March 27. 1925 hue/7 for Patented Feb. 1, 1927.

NETE STTS l,tl5,837

FFICE.

RAYMOND HANUS, OF BRUSSELS, BELGIUM, ASSIGNQB TO UNDERWOOD TYPEVI'RITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEVJBITING: MACHINE.

Application filed March 27, 1925. Serial No. 18,762.

This invention relates to typewriting machines, and more particularly to a circular knife for severing typed portions from a continuous web in the machine.

A feature of the invention relates to means comprising a support for said knife which may be'attached to any Underwood webtyping machine, such as illustrated in the lVernery & Smith Patent, No. 1,132,055, dated March 16, 1915. ported on a frame provided with straps by which it may be readily secured to a shaft of the typewriter-carriage. The knife-carrying frame is pivoted on said shaft, and

' ma be swun about its axis a ainst the tension of one or more return springs, towards a table, over which the work-sheet is conducted, to thus render the knife effective.

The knife is supported in a carriage mounted to travel on a rail or bar of the knife-carrying frame. Said carriage is in the form of a housing or covering for said knife, and it also serves as a finger-piece to manipulate the knife to first swing it towards the work-sheet, and then draw it across the work-sheet to sever the typed portion thereof.

An important feature which originates in the present invention is that locks are provided whereby the knife cannot be pressed against the paper, unless the knife is first positioned at the extreme right-hand end or at the extreme left-hand end of its travel. In other words, the operator must make either a perfect cut from side to side or else no out at all.

The knife, while in cutting position, extends through a slot in the table over which the work-sheet is conducted, and can enter the slot only from one end or the other end of the machine. This arrangement has the added advantage that it preserves or guards the cutting edge against injury as might occur if the cutter entered said slot at a point intermediate the ends thereof.

There is provided a locking bar which extends crosswise of the carriage and beyond the edges of the slot, and beyond the side edges of the work-sheet, said locking bar having co-operating therewith a stud on the knife-carriage which prevents said knife-carriage from being swung toward the table except when the knife is beyond the ends of the slot in said table. To permit the knife to be swung into register with the The knife is sup slot in said table, the table is provided at both sides of the slot with enlargements to permit free swinging movement of theknife to and from its effective position. The locking bar also. effective to prevent the return swinging movement of theknife-carriage while the knife is in the slot of the table, thus holding the knife in cutting relation With the work, and further guarding againstinjury to the cutting edge of the knife. Suitable detents are provided which may engage the knife to retain the knifecarriage at either side of its supporting frame, when out of use. i

To firmly hold the work-sheet against the table during a severing operation, there is provided a clamping bar which may be supported on the knife-carrying frame to be swung downwardly against the paper therewith, said bar being provided with a slot through which the knife extends. The knife is provided at each side with rollers to bear against said clamping bar to firmly press it against the table to hold the paper during the severing operation.

Other features and advantages will hereinafter appear.

In the accompanying drawings, 7

Figure 1 is a perspective view of the cutting attachment, showing the device as applied to an Underwood typewriting machine.

Figure 2 is a cross-sectional plan view on the line 22 of Figure 3,'showing the knifeframe applied to an Underwood typewriting machine of the fan-fold type.

Figure 3 is a cross-sectional view in elevation, onthe line 3-.3 of Figure 2, show ing the cutting attachment in its normal or idle position.

Figure 4; is a cross-sectional view of the knife.

Figure 5 is a crosssectional view of the knife-housing, shown in its effective or cut ting position.

In the Underwood fan-fold typewriting machine, a platen 10 is journaled in a swingframe, which includes end plates 11 journaled in a front shaft 12 extending across the carriage, so that the platen, may be swung forwardly in line with the work-sheet on the fan-fold table and clear of the feedrolls 13 and 14 which usually co-operate with the platen for feeding the work-sheet in line-space direction. The platen is shown geared to the line-space mechanism by means of pinions 15, meshing with idler pinions 16 on the shaft 12. Said idlcrs, in turn, mesh with pinions 17 fast on the shafts 18, which carry finger-wheels 19 for operating the platen, and are journaled in platen-frames 20.

The platen is normally locked in the position shown in Figure 3 with a web 21 drawn from the rear over a paper-table 22, down around the platen, past the feed rolls up to the printing point cooperating with the type-bar 23, and then rearwardly over a front table 24. In the usual operation of these machines, the web is line-spaced after each line of typing until the leading edge thereof strikes a gage 25, which is slidably mounted on a supporting member 26 fast to the front table.

When the leading edge of the web strikes the gage, it is desired to cut it off, so that a fresh section of the web may be typed upon, and, to this end, means are provided whereby the web may be held fast upon the front table while a circular knife having a cutting periphery is slid across the table in a slot 27 in said table parallel to the platen 10.

There is provided a knife-frame which comprises two end plates 28 rockably mounted on the shaft 12 to which it is attached by means of split bearings 29. The end plates are joined together by a cross-bar 30, preferably of rectangular cross-section, and by a pressure pad 31 which is fast to the end plates 28 by means ofscrews 32. Normally, the knife-frame is held in the position shown in Figure 3, out of the way, by means of springs 33 exerting tension between screws 34 which secure together the split bearings 29 and the spring-studs 35, a pin 33 stationary with respect to the end plates 11 providing a stop which is engaged by the pressure pad 31. A knife-housing 36 is slidably mounted on the cross-bar 30 and comprises a guard 37 and V grooved wheels 33 rotatably mounted on the screws 39. A knife blade 40 is revolubly mounted on the same screw which carries the wheel nearest to the table. Said knife comprises a hub 41 and a collar 42, both being riveted together to stiffen the knife-blade 40 which is held thereinbetween. The hub 41 and the collar 42 are further designed to co-operate with the pressure pad 31, to drive the knife as it is slid therealong to sever the sheets.

In order that the pressure on the knife may not be released before reaching the ends of the webs, thereby eliminating the possibility of partly severing the webs, and furthermore, in order not to damage the cutting edge of the knife-blade, there is provided a full-stroke mechanism whereby the knife may be swung into and out of engagement with the table only at the ends thereof. Said mechanism comprises a plate 43 fast to a shaft-housing 12 by means of screws 44, which plate is bent inwardly at 45, so that its edge cooperates with a pin 46 fast on the knife-guard 37. The plate extends substantially the full width of the table except for a portion at the ends which is cut away to clear the pin, so that the knife-housing may he slid to the end, in a position as shown in Figure 3, and then swung down to a position, shown in Figure 5, in co-operative relation with the table, clamping the webs under the pad 31 while being slid along to sever the web. The paper-table is provided with a cut-out portion 47 at the ends, to clear the knife-edge as the housing is swung into co-operation with the table.

To prevent the idle knife from creeping away during the ordinary operation of the machine, there are provided stops 43 which iear against the side of the knife-blade 40, thereby holding the housing under the pres sure of the stops through the resiliency of the knife-blade.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a platen and a work-table at the delivery side thereof, of a knife movable across the table and into cutting relation with a work-piece held against said table, and means for preventing withdrawal of the knife during work-cutting travel thereof from side to side of said work-piece.

2. In a typewriting machine, the con'ibination with a platen and a work-table at the delivery side thereof, of a knife movable from side to side of said table, a clamp for holding a work-piece against the table, to be severed by the knife, said knife and the clamp being movable from a normally ineffective position to a position adjacent the table, to engage the work-piece in cutting relation, and means for preventing withdra-wal of the clamp and said knife until the latter has effected a complete cut from side to side of said work-piece, during a cutting stroke.

3. In a typewriting machine, the combination with a platen and a work-table at the delivery side thereof, of a circular cutting knife mounted for travel crosswise of the table and toward and away therefrom, the table having a slot in which the knife may travel, clamps adjacent both sides of the knife for holding a work-piece to the table, and means for preventing release of the clamp and withd awal of said knife from the slot during the work-cutting travel of the latter, whereby said knife effects a complete and uninterrupted cut from side to side of the work-piece.

4. In a typewriting machine, the combina- .Zil

tion with a platen and a work-table at the delivery side thereof, of a frame swingable toward and away from said table, a knife carried by said frame, and movable from side to side therealong, clamping pads adjacent the opposite sides of said knife, said table having a slot extending thereacross, and into which the knife projects when the frame is swung toward the table, the pads being effective to hold awork-picce against the table (hiring work-cutting travel of the knife from side to side of said slot, and means for preenting the knife from being withdrawn from the work-piece at any point intermediate the side edges thereof during a cutting stroke of said knife across said workpiece.

5. In a type-writing machine, the combination with a platen and a table at the delivery side thereof, of a frame adjacent the front of the table and swingable toward and away therefrom, said frame including end pieces and a rod connecting said end pieces, a knife-carrying housing mounted on said rod, to travel from end to end thereof, a gripping pad carried by said frame and effective to grip a work-piece against the table when the frame is swung theretoward, said table having a slot therein, and into which the knife projects when the frame is swung toward the table, and means for preventing withdrawal of said knife from the slot and removal of the pad from the. workpiece until said knife has made a complete cut from side to side of said workpiece.

6. I11 a typewriting machine, the co1nbination with a platen and a platen-displacing frame, of a secondary frame associated with said displacingframe, the latter including a table at the delivery side of the platen, and having a slot extending thereacross, said secondary frame including end pieces, a shaftupon which the secondary frame swings toward or away from the table, a rod connecting the free ends of said end pieces, a housing the machine, along said rod, a circular cutting knife carried by the housing, gripping pads carried by the secondary frame, the latter being effective to swing the knife into the slot, only at a pointoutside of the side edges of a work-piece held against the table by said pads, the housing being movable from side to side of the machine to cause the knife to out across the work-piece, and means for preventing withdrawal of the knife during a work-cutting stroke thereof.

7. In a typewriting machine, in combination, a platen, a work-table at the delivery side thereof, a shaft extending adjacent the front of the platen from side to side of the table, a sleeve on said shaft and stationary relatively to said table, a frame mounted on said shaft, to rock toward and away from the table, a stop associated with said sleeve mounted to move from side to side of and engageable by the frai'ne to limit the rearward swing thereof on the shaft, a tension-spring normally holding said frame against the stop, said frame including end plates and a rod extending therebetween, a housing associated with said frame, and including rollers riding upon said rod, to sup port and guide said housing as it is moved along the rod from side to side of the machine, a cutting knife carried by the housing, a pair of gripping pads at both sides of the knife and extending completely across the frame from side to side thereof, said table having a slot extending thereacross, the frame being rockable toward the table and. into registry with the slot, only when the knife-housing is brought to position adjacent one of the ends of the machine with the knife outside the limits of the side edges of a work-piece held against the table by said gripping pads, and a guide carried by said. sleeve and co-operating with said housing for preventing withdrawal of said. knife from the work-piece during work-cutting travel thereof from side to side of said Workpiece.

8. In a typewriting machine, the combin ation with a platen and a work-table at the delivery side thereof, of a knife-carrying frame swingable toward or away from the platen, the table having a slot extending thereacross, and into which the knife may be projected, whereby to sever a work-piece held against the table, and means for detaining the knife against loose travel along the frame, when out of use.

9. In a typewriting machine, the combination with a platen and a work-table at the delivery side thereof, of a frame swingable toward or away from the table, means for limiting the swing of said table when thrown to position away therefrom, said table having a slot extending thereacross, the slot being enlarged adjacent the opposite ends thereof, a cutting knife movable from side to side on said frame, and swingable thereby into one of said enlarged portions of the slot whereby to bring the knife into position for cutting completely across a work-piece held against the table, and means for preventing withdrawal of said knife from the workpiece until said knife has effected such complete cut and entered the enlarged portion 'of the slot at the opposite end of the machine.

10. In a typewriting machine, the combination with a platen and a table at the dclivery side thereof, of a knife movable from an ineffective position to work-cutting position, only a point outside of the side-margins of a work-piece held against the platen, and means for thereafter preventing withdrawal of said knife from cutting relation with the work-piece during a cutting stroke 1 thereof from side to side.

11. In a typewritingmachine, the combination with a platen and a table at the delivery side thereof, of a knife for cutting off typed portions of a Work-piece held against the table the latter having a slot extending thereacross, the opposite ends of the slot be ing enlarged, said knife being movable from a normally ineffective position to a position Within one of the enlarged portions of the slot to bring the knife into alignment With the slot to travel therein during a cut across the Work-piece, and means for preventing return of said knife to ineffective position during a cutting stroke from side to side of said workpiece.

12. In combination, a typewriting machine of the fan-fold type, including a displaceable platen, a displaceable frame therefor, a cross-shaft at the delivery side of the platen upon Which the platen-frame is rockably mounted, and a table at the delivery side of said platen having a slot therein, a knife-frame rockably mounted on said shaft, said knife-frame including two end plates joined together by a cross-bar and a pressure pad fast upon the end plates and having a slot in the center extending the full length thereof means whereby a revolublymounted circular knife may be moved along the slot in said table to sever a Work-sheet clamped between the pressure pad and said table, said last-mentioned means including a knife-housing slidably mounted upon said cross-bar and a pivot-shaft fast on the housing on which the circular knife is revolubly mounted, and means for controlling the rocking movement of the knife-frame to prevent swinging of the knife out of the slot in the table While traveling therealong, and in cutting relation with the Work-sheet, said last-mentioned means including a cross-plate fast to the cross-shaft upon Which the platen-frame and the knife-frame are rockably mounted and a pin fast on the knifehousing co-operating with said cross-plate to hold the knife-frame in Work-cutting position, said cross-plate also co-operating With said pin to prevent the knife from starting a cut across the Work-sheet except at a point outward from the marginal edges thereof.

RAYMOND HANUS. 

